Spring hinge



Nov. 13, 1928.

E. Bon/"mare` SPRING HINGE Fi'led- MaICh 5, 1925 lNVENTOR i i l Patented Nov. 13, i928.

rentar EMIL norman, or reconnait, nnw'voan. 1

srnineriinsn. 4 i.

Appiieaaon. aiefi irakien 1925. sei-iai No) 13,o 13.'

a cylindrical extension to the pivotal shaft and disposing between a shoulder of this er;-

cnsion and a supporting member a lnurled collar, the lrnurled surface of which engages the surface of the shoulder and the surface of i l the support when the shoulders are fastened together in suoli way as to bring about a firm alignment of the parts.

rThe invention will be more fully c hereinafter'. Embodiments thereoi V.will be shown in the drawings and the features of the invention finally pointed out in t ie claim.

n the accompanying drawings,-

Figure 1 is a vertical section through the casing of my improved spring liiA Y' ing the features of the invention forming the basis of this present application;

Fig. 2 is a horizontal section talren on line 2-2 of Fig. 1; y

Fig. 3 is a plan view of the linurled collar;

F 4 is a perspective view of the plate having a shoulder; f

Fig. 5 is a perspective view of my improved pivot shaft having swaged extensions; and

Fig. 6 is a section talren on line 6-16 of Fig. 5.

Similar characters of reference indica-te.

corresponding parts throughout the various views.

Referring to theV drawings and more particularly to Fig. 1, the door jamb or support is indicated generally by 10. andthe door central pivot pin 21 having an upper end 22 shoulders or the spring end gauglescribed seated within the socket arranged., l rlhe lower end of the pivot pin 21 is provided with a portion 22L fitted within the inner sur'- face flangel 16.' lhis portion"22ffforms ra shoulder 23 in respect to a lportion 24`jof i smaller diameter and the lower endv of the portion 24 is cylindrical and providedvwith l' exterior screw threads 25. Disposedron the pivot pin 21 inthe portion thereof within the cylindrical Ycasing is an-uppervplate 26 and a? lower plate27, said platesbeing preferably of malleable cast iron. 'These plates have extending portions 28, yeachplate having a bore conforming to the lexteriorvdiainete'r of the pin'21 and each having'a'shoulf derv portion 29. yA 'helical spring/30 has one i end 31 bent inwardly and engaging within a recess 32 in the plate 26 and the other end of the spring is bent inwardly and engages within 'a corresponding recess in the plate 27. rlhe interior of the casing is providedwith a rib 34 againstl which projecting shoulders 33 of the plates 26 and 27 abut. n y

The'pin 21 is made of certain construction' which is believed to be novel in the art and consists essentially of having two projections 34 and 35 swaged out of the material com-k posing the pin when the pin is vin its original cylindrical form. These projections 34 and 35 are abutted bythe shoulders 29 of the plates 26 and 27 and are yieldingly main* tained in engagementv with the shoulders V29 by the torsional action of spring 30 which is placed under considerable tension in placing` Vthe platesin the position shown. The pin v itselfis made of a single piece of cold drawn steel finished in an automatic screw machine and the shoulders 34 and 35 are automatically swagedoutwardly in a press operation, being shaped -out `of the curved portion formeel within the contour of the)pin7 las shown in Fig. 6.y Y

- The cylindrical portion 24' of the pivot pin ts into a bore 37 of a support 38 on a suitable braclret 39 adapted to be secured to the door 'support or jamb; Interposed betweenl this member 38 and the shoulder 231s an anf vnular collar havinor a bore of the' diameter substantially equal to the diameter Vof theV cylindrical portion 24 and this annular collar indicated by 40 has its upper and' lower surface provided with knurled portions, as indicated by 42 in Fig. 3. When it is desired to align the door7 the nut 44 is loosened and the il in may be vreadily rotated in respect tothe support- 38 until the position of the door in respect tothe jalnb isobtained. When the desired position has been decided upon the nut 44 is screwed along the screw threaded portion 25 and thereby the `shoulder V23 is forced against the knurled portion 42 of the annular collar 40 and at the same time the other surface having the knurled portion of the annular colla-r is forced against a seat 46 of the supportc38. VBy this engagement the knurled surface of thecollar 40 with the shoulder 23V and the support. 38 are very securely held and a tightvwedgin'g action is obi tained which i's of such a` character that when i the nut 44 hasbeen screwed tight then the door is aligned and the `parts properly held in position. v Y

` In the accompanying drawings and foregoing description, I have disclosed a particui lar embodimentvof the invention which has proven highly' satisfactory. yThe parts are of simple construction and in their cooperation a spring hinge for double swinging doors which is light, strong and durable is provided. It

will be Aapparent that "the improved spring hinge construction is susceptible of modicav tion. Accordingly, the privilege is reserved of resorting to all such legitimate changes in forni, proportion and arrangement of the several cooperating parts as may be fairly embodied within the spirit and scope of the invention as claimed. Y

Vhat is claimed as the invention and is desired to be secured by Letters Patent is:

A spring hinge comprising an apertured bracket, a pivot pin seated in the aperture in the bracket, means for locking the pin in fixed position in the bracket, the pivot pin being substantially cylindrical and having vertically extending shoulder means between the upper and lower ends thereof,- said shoulder mea-ns being swaged out of the cylindrical EMIL BOMMER. 

